| meteoroid | <astronomy> A small body moving through space, or revolving about the sun, which on entering the earth's atmosphere would be deflagrated and appear as a meteor. "These bodies [small, solid bodies] before they come into the air, I call meteoroids." (H. A. Newton) Origin: Meteor. Source: Websters Dictionary (01 Mar 1998) |
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| meteoroids | Any solid objects moving in interplanetary space that are smaller than a planet or asteroid but larger than a molecule. Meteorites are any meteoroid that has fallen to a planetary surface. (12 Dec 1998) |